<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Order extends Model
{
    //退款状态
    const REFUND_STATUS_PENDING = 'pending';
    const REFUND_STATUS_APPLIED = 'applied';
    const REFUND_STATUS_PROCESSING = 'processing';
    const REFUND_STATUS_SUCCESS = 'success';
    const REFUND_STATUS_FAILED = 'failed';

    //物流状态
    const SHIP_STATUS_PENDING = 'pending';
    const SHIP_STATUS_DELIVERED = 'delivered';
    const SHIP_STATUS_RECEIVED = 'received';

    public static $refundStatusMap = [
        self::REFUND_STATUS_PENDING  => '未退款',
        self::REFUND_STATUS_APPLIED  =>'已申请退款',
        self::REFUND_STATUS_PROCESSING =>'退款中',
        self::REFUND_STATUS_SUCCESS  => '退款成功',
        self::REFUND_STATUS_FAILED   => '退款失败',
    ];

    public static $shipStatusMap = [
        self::SHIP_STATUS_PENDING  => '未发货',
        self::SHIP_STATUS_DELIVERED => '已发货',
        self::SHIP_STATUS_RECEIVED  => '已收货',
    ];

    protected $fillable = [
        'no',
        'address',
        'total_amount',
        'remark',
        'paid_at',
        'payment_method',
        'payment_no',
        'refund_status',
        'refund_no',
        'closed',
        'reviewed',
        'ship_status',
        'ship_data',
        'extra',
    ];

    //转化字符类型
    protected $casts = [
        'closed'    => 'boolean',
        'reviewed'  => 'boolean',
        'address'   => 'json',
        'ship_data' => 'json',
        'extra'     => 'json',
    ];

    protected $dates = [
        'paid_at',
    ];

    //orders 保存用户、金额、收货地址等信息
    public function user()
    {
        return $this->belongsTo(User::class);
    }
    public function items()
    {
        return $this->hasMany(OrderItem::class);
    }
    //创建事件监听函数，用于自动生成订单的流水号
    protected static function boot()
    {
        parent::boot();
        //监听模型创建事件，在写入数据库之前触发
        static::creating(function ($model){
           //如果模型的no字段为空
            if(!$model->no){
                // 调用 findAvailableNo 生成订单流水号
                $model->no = static::findAvailableNo();
                //如果生成失败，则终止创建订单
                if(!$model->no){
                    return false;
                }
            }
        });
    }

    //自动生成订单
    public static function findAvailableNo()
    {
        //订单流水号的前缀
        $prefix = date('YmdHis');
        for($i=0;$i<10;$i++){
            //随机生成6位的数字
            $no = $prefix.str_pad(random_int(0,999999),6,'0',STR_PAD_LEFT);
            //判断是否已经存在
            if(!static::query()->where('no',$no)->exists()){
                return $no;
            }
        }

        \Log::warning('find order no failed');
        return false;
    }
}
